Add get_size() method to tree_node.

libisofs/libisofs.h

@@ -894,6 +894,9 @@ void iso_tree_node_set_permissions(struct iso_tree_node *node, mode_t mode);
 /** Get the permissions for the node */
 mode_t iso_tree_node_get_permissions(struct iso_tree_node *node);
 
+/** Get the size of the node, in bytes */
+off_t iso_tree_node_get_size(struct iso_tree_node *node);
+
 /**
  * Sets the order in which a node will be written on image. High weihted files
  * will be written first, so in a disc them will be written near the center.

libisofs/tree.c

@@ -223,6 +223,12 @@ iso_tree_node_get_permissions(struct iso_tree_node *node)
 	return node->attrib.st_mode & ~S_IFMT;
 }
 
+off_t 
+iso_tree_node_get_size(struct iso_tree_node *node)
+{
+	return node->attrib.st_size;
+}
+
 void 
 iso_tree_node_set_sort_weight(struct iso_tree_node *node, int w)
 {